package com.daiqee.service.httpclient;

import java.io.IOException; 
import java.net.URI;  
import java.net.URISyntaxException;  
import java.util.ArrayList;  
import java.util.List;  
import java.util.Map;  
import org.apache.http.NameValuePair;  
import org.apache.http.client.ClientProtocolException;  
import org.apache.http.client.config.RequestConfig;  
import org.apache.http.client.entity.UrlEncodedFormEntity;  
import org.apache.http.client.methods.CloseableHttpResponse;  
import org.apache.http.client.methods.HttpGet;  
import org.apache.http.client.methods.HttpPost;  
import org.apache.http.client.utils.URIBuilder;  
import org.apache.http.impl.client.CloseableHttpClient;  
import org.apache.http.message.BasicNameValuePair;  
import org.apache.http.util.EntityUtils;  
import org.springframework.beans.factory.annotation.Autowired;  
import org.springframework.stereotype.Service;  
 
/**
 * HttpClient
 * 
 * <br/>
 * @since JDK 1.8
 * @version  V2.1
 * @author RichardTang 
 * @date: 2018年5月8日 上午8:21:11
 * @package com.daiqee.service.httpclient
 * @copyright:Copyright (c) 2018, 1245811923@qq.com All Rights Reserved.
 */
@Service  
public class HttpClientService {  
  
    // 创建Httpclient对象  
    @Autowired
    private CloseableHttpClient httpClient;  
  
    // 请求信息的配置  
    @Autowired
    private RequestConfig requestConfig;  
  
    /** 
     * 执行Get请求 
     *  
     * @param url 
     * @return 请求到的内容 
     * @throws URISyntaxException 
     * @throws IOException 
     * @throws ClientProtocolException 
     */  
    public String doGet(String url) throws URISyntaxException,  
            ClientProtocolException, IOException {  
        return doGet(url, null);  
    }  
  
    /** 
     * 执行Get请求 
     *  
     * @param url 
     * @param params 
     *            请求中的参数 
     * @return 请求到的内容 
     * @throws URISyntaxException 
     * @throws IOException 
     * @throws ClientProtocolException 
     */  
    public String doGet(String url, Map<String, Object> params)  
            throws URISyntaxException, ClientProtocolException, IOException {  
        // 定义请求的参数  
        URI uri = null;  
        if (params != null) {  
            URIBuilder builder = new URIBuilder(url);  
            for (Map.Entry<String, Object> entry : params.entrySet()) {  
                builder.addParameter(entry.getKey(),  
                        String.valueOf(entry.getValue()));  
            }  
            uri = builder.build();  
        }  
  
        // 创建http GET请求  
        HttpGet httpGet = null;  
        if (uri != null) {  
            httpGet = new HttpGet(uri);  
        } else {  
            httpGet = new HttpGet(url);  
        }  
        // 设置请求参数  
        httpGet.setConfig(this.requestConfig);  
  
        // 请求的结果  
        CloseableHttpResponse response = null;  
        try {  
            // 执行请求  
            response = httpClient.execute(httpGet);  
            // 判断返回状态是否为200  
            if (response.getStatusLine().getStatusCode() == 200) {  
                // 获取服务端返回的数据,并返回  
                return EntityUtils.toString(response.getEntity(), "UTF-8");  
            }  
        } finally {  
            if (response != null) {  
                response.close();  
            }  
        }  
        return null;  
    }  
  
    /** 
     *  
     * @param url 
     * @param params 
     *            请求中的参数 
     * @return 请求到的内容 
     * @throws URISyntaxException 
     * @throws ClientProtocolException 
     * @throws IOException 
     */  
    public String doPost(String url, Map<String, Object> params)  
            throws URISyntaxException, ClientProtocolException, IOException {  
        // 设置post参数  
        List<NameValuePair> parameters = null;  
        // 构造一个form表单式的实体  
        UrlEncodedFormEntity formEntity = null;  
  
        // 定义请求的参数  
        if (params != null) {  
            // 设置post参数  
            parameters = new ArrayList<NameValuePair>();  
            for (Map.Entry<String, Object> entry : params.entrySet()) {  
                // 添加参数  
                parameters.add(new BasicNameValuePair(entry.getKey(), String  
                        .valueOf(entry.getValue())));  
            }  
            // 构造一个form表单式的实体  
            formEntity = new UrlEncodedFormEntity(parameters);  
        }  
  
        // 创建http GET请求  
        HttpPost httpPost = null;  
        if (formEntity != null) {  
            httpPost = new HttpPost(url);  
            // 将请求实体设置到httpPost对象中  
            httpPost.setEntity(formEntity);  
            // 伪装浏览器请求  
            httpPost.setHeader(  
                    "User-Agent",  
                    "Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2272.118 Safari/537.36");  
        } else {  
            httpPost = new HttpPost(url);  
            // 伪装浏览器请求  
            httpPost.setHeader(  
                    "User-Agent",  
                    "Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2272.118 Safari/537.36");  
        }  
        // 设置请求参数  
        httpPost.setConfig(this.requestConfig);  
  
        // 请求的结果  
        CloseableHttpResponse response = null;  
        try {  
            // 执行请求  
            response = httpClient.execute(httpPost);  
            // 判断返回状态是否为200  
            if (response.getStatusLine().getStatusCode() == 200) {  
                // 获取服务端返回的数据,并返回  
                return EntityUtils.toString(response.getEntity(), "UTF-8");  
            }  
        } finally {  
            if (response != null) {  
                response.close();  
            }  
        }  
        return null;  
    }  
  
    /** 
     *  
     * @param url 
     * @param params 
     *            请求中的参数 
     * @return 请求到的内容 
     * @throws URISyntaxException 
     * @throws ClientProtocolException 
     * @throws IOException 
     */  
    public String doPost(String url) throws URISyntaxException,  
            ClientProtocolException, IOException {  
        return doPost(url, null);  
    }  
}  
